柴达木盆地北缘西段新近系上干柴沟组高分辨率层序地层学研究  

High resolution sequence stratigraphy of Neogene upper Ganchaigou Formation in west segment,northern margin of Qaidam Basin

作　　者：刘琪[1] 李凤杰[1] 郑荣才[1,2] 刘殿鹤[1] 蒋斌[1] 

机构地区：[1]成都理工大学沉积地质研究院 [2]成都理工大学"油气藏地质及开发工程"国家重点实验室

出　　处：《岩性油气藏》2010年第1期65-69,75,共6页Lithologic Reservoirs

摘　　要：以高分辨率层序地层学原理为指导,通过野外露头剖面、岩心观察、钻井及测井曲线等资料分析,将上干柴沟组划分为2个长期基准面旋回和6个中期基准面旋回,分析了2个级别旋回的结构、叠加样式,在单井层序划分的基础上建立了上干柴沟组层序地层格架对比图。长期基准面旋回结构分布特点与地层之间存在较好的对应关系,位于湖盆中心、地层厚度大的地区主要发育C2型长期基准面旋回结构,而位于湖盆边部、地层相对较薄的地区主要发育C1型长期基准面旋回结构。最后以上干柴沟组层序地层等时对比格架为基础,编制了该区的岩相古地理图。Based on high resolution sequence stratigraphy theory, and according to the analysis of description of field outcrop profiles, cores, well drilling and logging trace, the Neogene upper Ganchaigou Formation in west segment,northern margin of Qaidam Basin are divided into two long-term base level cycles and six medium-term base level cycles. The deposition structure and stacking patterns of this two levels cycle are analyzed. Sequence stratigraphic framework of upper Ganchaigou Formation is established based on the sequence division of single well. The distribution feature of long-term base level cycle sequence has better relation with stratum. The long-term base level cycle sequence type of C2 mainly developed in the central basin and thick stratum areas, and the type of C~ mainly developed in the margin of the basin and thin stratum areas. Based on the sequence stratigraphic isochronous correlation framework, the lithofacies and paleogeography map of the study area have been drawn up.

关 键 词：高分辨率层序地层 基准面旋回 岩相古地理 上干柴沟组 柴达木盆地 

分 类 号：TE121.3[石油与天然气工程—油气勘探]